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公开(公告)号：US20170152881A1
公开(公告)日：2017-06-01
申请号：US14953138
申请日：2015-11-27
申请人： Hui-Ju YANG
发明人： Hui-Ju YANG
CPC分类号： F16B25/0015 , F16B25/0084 , F16B25/106
摘要： A screw has a circular rod, a pointed cone, a head, a first threaded portion, a second threaded portion and a third threaded portion, wherein the pointed cone is formed on a first portion of the circular rod, the head is formed on a second portion of the circular rod, the first threaded portion is formed from the pointed cone to the first portion and has two first threads having a first pitch, the second threaded portion is formed on the circular rod and has a second thread having a second pitch, the third threaded portion is formed on the circular rod and has a third thread having a third pitch, the first pitch is longer than the second pitch and the third pitch, the configuration of which provides a screw to drill and screw into multiple wooden workpieces steadily and quickly.
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公开(公告)号：US20170108026A1
公开(公告)日：2017-04-20
申请号：US14884715
申请日：2015-10-15
申请人： Hui-Ju YANG
发明人： Hui-Ju YANG
CPC分类号： F16B25/103 , F16B25/0015 , F16B25/0078
摘要： The screw comprises a circular rod, a tip, a tool connecting part, a thread part, and multiple protruding ribs. The circular rod has a centerline, a tail end, and a head end. The tip is formed on the tail end. The tool connecting part is formed on the head end. The thread part helically extends from an outer surface of the tip to an outer surface of the circular rod. The multiple protruding ribs are formed on an outer surface around the tail end and disposed in multiple thread pitches of the thread part from the tip. The multiple protruding ribs straightly extend on the circular rod and are parallel to the centerline, and provide a reaming effect to reduce resistance when the tip of the screw is screwed into the workpiece. So chips are smoothly discharged from the workpiece.
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